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(updated 10 Oct 2023)
IO-45 Ham Roof Tower
| Specifications | IO-45 | Competitor's Tower |
| Tower Height | 4.5 feet (54 inches) | 4.5 feet (54 inches) |
| Shipping Weight | 27 lbs. | 17 lbs. |
| Base Width (to outer edge of leg) | 25 inches | 24 inches |
| Base Width (to outer edge of foot) | 29 inches | 26.75 inches |
| Max. Antenna Wind Area at tower top | 10 sq. ft. at 80 mph | 10.2 sq. ft. at 85 mph |
| Max. Antenna + Rotor + Mast weight | 150 lbs. | 125 lbs. |
| Tower Top Width | 5 inches | 5 inches |
| Rotor Plate location from Top | 34.5 inches (bottom shelf) | 34.75 inches |
| Maximum Mast Diameter | 2.5 inches | 2.375 inches |
| Maximum Mast Length | 7 feet (84 inches) | 5 feet (60 inches) |
| Rotor Mounting Options | Hy-Gain or Yaesu |
Hy-Gain and Yaesu |
| Thrust Bearing Mounting Options | Yaesu GS-065 or GS-050 |
TB-25 (optional) |
| Fixed (non-rotating) Mast Option | UMB-1 |
MC-10 (optional) |
| Leg and shelf material | 6061-T6 aluminum (1/8" thick x 2" angle) | 6061-T6 aluminum (1/8" thick x 1.5" angle) |
| Foot material | 6061-T6 aluminum (1/4" thick x 2" angle) | 6061-T6 aluminum (1.5" x 2" angle) |
| X-Brace material | 6061-T6511 aluminum (1/8" x 2" flat) | 6061-T6511 aluminum (1/8" x 3/4" flat) |
| Assembly Hardware | 1/4"-20 18-8 stainless steel | 1/4"-20 18-8 stainless steel |
| Foot to Leg hardware | 5/16"-18 18-8 stainless steel | 3/8"-16 18-8 stainless steel |
| Lockwashers/nylon locknuts | Yes | nylon locknuts |
| Holes Deburred | Yes | ? |
| Part Edges Deburred | Yes | ? |
| Climbable | Yes - with tower climbing belt or harness | No |
Model IO-45
contact Roger: email to
rgcox2 (at) gmail.com
Roger Cox, W8IO (ex-WB0DGF) - Spring Lake, MI 49456